براغي ذات رأس مقبس 5/8-11 × 3-1/2 بوصة | محرك سداسي المقبس | صناعة أمريكية | فولاذ سبائكي مع أكسيد أسود حراري (140 / عبوة)

Roughly 40 of these went into a precision assembly fixture I’m building, and every single socket drove smoothly without any cam-out. The black oxide finish feels substantial and hasn’t chipped during torquing, which is exactly what I hoped for.

I needed heavy-duty bolts for a jig I was building, and these 5/8-11 screws threaded perfectly into my existing fixtures without any binding. The hex socket drive takes an Allen key well, and the 140 count will last me through several projects.

The black oxide finish on these is what sold me—they slide into the hex socket smooth and the machining on the threads is clean. Used them to beef up a press fixture and they’re holding torque perfectly. Pack of 140 is solid value for this grade of bolt.